Re: needs MOAR powah
I think you can get a little more out of it considering you got the big motor. If you feel your tuning it good you'll probably do better with taller gearing.
I have a 48cc with 40T sprocket, and standard carb. I weigh 215 lbs, and my bike about 60 lbs. I have very minor port work on the manifolds, $12 air cleaner, and a 68 jet.
My bike will pull 28 up a slight grade, and on slight down hill I've hit 33, but it took 2 blocks to do it. On most slight down grades I can see 30. Your bike might do alright with a 36T, but mine has so little torque I don't think I would be happy with less than my 40.